IRIS Institutional Research Information System - OPENBS Open Archive UniBS
il nuovo catalogo dedicato alla raccolta e alla disseminazione della produzione scientifica dell'Università degli Studi di
Brescia, denominato OPENBS. E' possibile cercare pubblicazioni in OPENBS:
- per parola chiave, utilizzando la barra di ricerca situata in alto
- per filtro di ricerca (Autore, Titolo, Riviste), utilizzando il pulsante Sfoglia
- specificando criteri di ricerca con possibilità di aggiungere gradualmente più filtri (Autore, Data, Tipologia,..) che
perfezionino i risultati, utilizzando la finestra Ricerca - per elemento di filtro di ricerca (e.g. per un elemento di Tipologia: contributo su rivista) nella sezione Scopri
EnglishWhen a reinforced concrete structure is very loaded, the reinforcement congestion can occurred. In this situation, the use of bundles in two, three or four instead of individual bars could reduce or even avoid the reinforcement congestion, allowing an easier compaction of concrete. However, there is still a lack in knowledge of the fundamental phenomena related to the bond behaviour of bars in bundles. The different codes of practice (i.e. ACI 318-14 and Eurocode 2) consider a bundle (group of bars) as a single bar of equivalent diameter. This assumption have been evaluated in the present paper by means of an experimental program on a set of pull-out tests loaded on bundles (two or three bars) and their equivalent diameter. Results indicate that the bundles have a significantly greater loading capacity than their equivalent bars. Consequently, the codes lead to conservative predictions of the bond strength of bar in bundles. The possible equivalence in terms of minimum perimeters between a bundles and a single bar have been also evaluated by a second experimental program carried out on another set of pull-out specimens. The results showed that this equivalence leads to bond strength predictions closer to the ones experimentally observed, even though it resulted unconservative in some cases and therefore should not be adopted in practice.
| Titolo: | Experimental Study on the Bond Behavior of Bundled Bars |
| Autori: | |
| Data di pubblicazione: | 2017 |
| Abstract: | When a reinforced concrete structure is very loaded, the reinforcement congestion can occurred. In this situation, the use of bundles in two, three or four instead of individual bars could reduce or even avoid the reinforcement congestion, allowing an easier compaction of concrete. However, there is still a lack in knowledge of the fundamental phenomena related to the bond behaviour of bars in bundles. The different codes of practice (i.e. ACI 318-14 and Eurocode 2) consider a bundle (group of bars) as a single bar of equivalent diameter. This assumption have been evaluated in the present paper by means of an experimental program on a set of pull-out tests loaded on bundles (two or three bars) and their equivalent diameter. Results indicate that the bundles have a significantly greater loading capacity than their equivalent bars. Consequently, the codes lead to conservative predictions of the bond strength of bar in bundles. The possible equivalence in terms of minimum perimeters between a bundles and a single bar have been also evaluated by a second experimental program carried out on another set of pull-out specimens. The results showed that this equivalence leads to bond strength predictions closer to the ones experimentally observed, even though it resulted unconservative in some cases and therefore should not be adopted in practice. |
| Handle: | http://hdl.handle.net/11379/498204 |
| Appare nelle tipologie: | 4.2 Abstract in Atti di convegno |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Abstract ACI Convention Bond 2017.pdf | Experimental study on the bond behavior of bundled bars | Abstract |  | Utenti riconosciuti Richiedi una copia |
Copyright © 2021